{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM2646-0","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM2646-0","canonicalUrl":"https://aoctrl.com/siemens/5SM2646-0","factsUrl":"https://aoctrl.com/api/mcp/products/5SM2646-0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, RCD-unit, 4-pole, 63 A, 300 mA, Type AC, instantaneous, IP20, 3 MW.","salesMarkdown":"## What this 4-pole RCD does on the line Instantaneous design means no intentional time delay; it trips as soon as the residual exceeds the threshold. The headline 63 A AC rating is at the reference ambient — but the part derates in warmer cabinets: 58.6 A at 40 °C, 58.59 A at 45 °C, 56.7 A at 50 °C, 54.81 A at 55 °C, 53.55 A at 60 °C, 52.29 A at 65 °C, and 50.4 A at 70 °C. The 300 mA residual threshold is fixed — not adjustable — and the OFF-delay is not adjustable either, so this is a straight instantaneous trip, not a time-delay S-type unit. Insulation voltage (Ui) is rated 460 V, surge voltage resistance 4 kV. The operating frequency is fixed at 50 Hz. Fastening method is REG (regular DIN-rail clip). Mounting position is any orientation. Depth is 70 mm, height 90 mm, width 123 mm overall.","metaTitle":"Siemens SENTRON 5SM2646-0 RCD, 4P, 63 A, 300 mA, Type AC","metaDescription":"Siemens SENTRON 5SM2646-0 4-pole RCD, 63 A rated current, 300 mA residual, Type AC, instantaneous. IP20. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"70 mm","Width":"123 mm","title":"5SM2646-0","Height":"90 mm","Maximum":"45 °C","Minimum":"-5 °C","Sealable":"No","description":"RC unit for 5SL4, 4-pole, type AC, In: 63 A, 300 mA, Un AC: 400 V","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"REG","Mounting Position":"any","at AC rated value":"63 A","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Maximum Permissible":"75 °C","Minimum Permissible":"-40 °C","Product Designation":"RCD-unit","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"instantaneous","Residual Current Type":"AC","at 40 °C rated value":"58.6 A","at 45 °C rated value":"58.59 A","at 50 °C rated value":"56.7 A","at 55 °C rated value":"54.81 A","at 60 °C rated value":"53.55 A","at 65 °C rated value":"52.29 A","at 70 °C rated value":"50.4 A","OFF-delay time adjustable":"No","Number Of Modular Width Units":"3","Rated Fault Current Adjustable":"No","Protection Function False Tripping":"Yes","Tripping Fault Current Rated Value":"300 mA","insulation voltage (Ui) rated value":"460 V","Surge Voltage Resistance Rated Value":"4 000 V","Value Range Of The Operating Frequency":"50 Hz","Value Range Of The Supply Voltage Frequency":"50 Hz","Supply Voltage For Testing Equipment Minimum":"195 V","Mechanical Service Life (Operating Cycles) Typical":"10 000","for rated value of the current at AC in hot operating state per pole":"3 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/087d3beb4eed322ea556fcb86816fdbe.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=129150&mlfb=5SM2646-0"},"ai":{"faq":[{"question":"Where can I buy the 5SM2646-0 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — no stock count or price is published here."},{"question":"What is the 5SM2646-0's depth?","answer":"The listed depth is 70 mm, installation depth also 70 mm."},{"question":"What is the 5SM2646-0's width?","answer":"The overall width is 123 mm, which corresponds to 3 modular width units on a DIN rail."},{"question":"Will the 5SM2646-0 drop into a panel specified around the 5SL4363-7?","answer":"No — the 5SL4363-7 is a miniature circuit breaker (MCB), not an RCD. They serve different protection functions and are not drop-in interchangeable. The 5SM2646-0 is an RCD; the 5SL4363-7 is an MCB."},{"question":"What compliance documentation does Siemens provide for the 5SM2646-0?","answer":"The part carries the SENTRON brand and is designed to meet applicable IEC/EN standards for RCDs (e.g., EN 61008). Specific RoHS, REACH, UL, or IEC declarations are available from Siemens documentation — this listing does not reproduce them."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM2646-0","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/5SM2646-0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}